Parse a text file and process batches

TextFileParser.java

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package javaperfdemo;

import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class TextFileParser {
    static int BATCH_SZIE = 10;
    
    public static void main(String[] args) throws FileNotFoundException, IOException {        
        FileInputStream fstream = new FileInputStream("newfile.txt");
        DataInputStream in = new DataInputStream(fstream);
        BufferedReader br = new BufferedReader(new InputStreamReader(in));
        String strLine;
        List<List<String>> l = new ArrayList<List<String>>();
        int counter = 0;
        while ((strLine = br.readLine()) != null) {
            l.add(Arrays.asList(strLine.split(",")));
            counter++;
            if (counter > BATCH_SZIE) {
                process(l);
                System.out.println("====================");
                counter = 0;
                l = new ArrayList<List<String>>();
            }
        }
        System.out.println("Processing last batch");
        process(l);
    }

    public static void process(List<List<String>> list) {
        System.out.println(list);
    }
}